CLASSIFICATION
- T - Technology 162 hua
- L - Education 69 hua
- H - Social Science 48 hua
- Q - Science 35 hua
- G - Geography, Anthropology, Recreation 14 hua
- C - Historical Sciences 10 hua
- S - Agriculture 7 hua
- A - General Works 3 hua
- F - General American History 3 hua
- D - World History 2 hua
- R - Medicine 2 hua
- K - Law 1 hua